Steam-actuated valve for engines



(No Model.)

H. BRBITENSTEIN.

, STEAM AGTUATED'VALVE EOE ENGINES. No. 509,291. Patented Nov. 21, 1893.

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UNITED STATES PATE T OFFICE.

HENRY BREIT'ENSTEIN, OF LARAMIE, WYOMING.

STEAM-ACTU-ATED VALVE 'FO'R ENGINES.

SPECIFICATION forming part of Letters Patent No. 509,291, dated November21, 1833'.

Application filed February 8, 1893.

erial No. 461,469. (No model.)

To aZZ whom it may concern.-

Be it known that I, HENRY BREITENSTEIN, of Laramie, in the county ofAlbanyand State of Wyoming,have invented a new and ImprovedSteam-Actuated Valve for Engines, of which the following is a full,clear, and exact description.

The invention relates to direct-acting duplex engines, and its object isto provide a new and improved engine, which is simple and durable inconstruction, very effective in operation, and arranged to utilize themotive agent to the fullest advantage.

The invention consists of two cylinders, eachconnected at one end withthe opposite end of the other cylinder, pistons moving in oppositedirections in the said cylinders, a slide valve controlling the inletand exha st ports for the said cylinders, puppet valves actuated by thesaid pistons, and differential auxiliary pistons carryingthe said slidevalve and controlled by the said puppet valves.

The invention also consists of certain parts and details, andcombinations of the same, as will be hereinafter described and thenpointed out in the claims.

Reference is to be had to the accompanying drawings forminga part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure l is a sectional side elevation of the improvement. Fig. 2 isatransverse section of the same on'the line 2-2 of Fig. 1; and Fig. 3 isa plan view of the seat of one of the puppet valves.

The improved direct-acting duplex engine is provided with the cylindersAand A, containing the pistons B and B respectively, secured on thepiston rods 0 and C respectively, connected with the main driving shaftor pump pistons in the usual manner. The cylinder A is connected nearits upper end bya port a, with the lower end of the other cylinder A,and the latter is inalike manner connected near its upper end, by a portb with the lower end of the other cylinder A. The cylinders A and A areconnected at theirupper ends by the ports cand d, with the cylindricalvalve chest E, provided with the usual inlet e for the active motiveagent. In the steam chest E is mounted to slide a slide valve Foperatingover the ports 0 and d,and

also operating over an exhaust portf, leading to the outside andconnected with theusual exhaust pipe. The slide valve F serves toalternately open the ports 0 and d to the steam chest E to admit livesteam to the respective cylinders A and A by the respective ports 0 andd, and the cylinder A or A again permits part of the live motive agentto pass through the respective port a or b, to the other end of theother cylinder A or A. Thus, when live steam is admitted into the upperend of one cylinderit forces the piston therein downward, and as part ofthis live steam passes to the lower end of the other cylinder, thepiston of this other cylinder is forced upward at the same time that theother piston moves downward. The slide valve F is held on a'stem F,which forms the piston rod for two auxiliary pistons G and G, of whichthe piston G is mounted to slide in the steam chest E, and the otherlarger piston G is fitted to slide in an enlargement E extending on oneside of the steam chest E, and forming part thereof. In the upper endsofthe cylinders A and A are mounted to slide puppet valves H and Hfitted in seats I and 1 respectively, closed by suitable caps J and Jrespectively, as plainly shown'in Fig. l. The upperend of the valve seatI is connected by a port 9 with the steam chest E, between'the slidevalve F and the auxiliary piston G, and the lowerend of the other puppetvalve seat I is connected by a port It with thesaid steam chest Ebetween the valve F and the other piston G. The upper end of the valveseat I is connected by a port 1' with the enlarged end E of the steamchest E, and this port is adapted to be closed or opened by the pistonG. The lower end of the valve seat I is also connected with the outerend of the enlargement E containing the auxiliary piston G, by means ofa port j into which opens a branch portj, from the lower end of the seatI. From the lower end of the valve seat I leads a port is to the exhaustportf, as illustrated in Fig. l.

Theoperation is as follows: When the piston B in the cylinderA has aboutcompleted its tip-stroke, as shown in Fig. 1,it has lifted the puppetvalve H, while the other puppet valve H is seated in its seat I, and thepiston B is at the end of its down-stroke. When the puppet valve H risesto the position shown in Fig. 1, steam from the steam chest E can passthrough the port It into the valve seat I and from thelatter throughthebranch port j, and port j into the enlarged outer end E of the steamchest E, so that the preponderance of steam pressure ison the piston G,whereby the latter is forced to the left, thus shifting the slide valveF to the position shown in Fig. 1, so that the port at is uncovered,while the ports a and f are connected with each other by the slide valveF. Live motive agent can now pass from the steam chest E through theportd into the upper end of the cylinder A to act on the piston 13' tomove the latter downward, and at the same time steam can pass from theupper end of the cylinder A, through the port 19 into the lower end ofthe other cylinder A, to act on the piston B, soas to force the latterupward. The exhaust from the cylinder A, now takes place through theport c, slide valve F, to exhaust port f, and the exhaust from thecylinder A takes place through the portaand portscandf. The steam whichenters the valve seat I by ports h,holds the puppet valve H in anuppermost position with the assistance of the steam that acts on thepiston 13' and also acts on the bottom of the puppet valve H until thepiston B is at its down-stroke, and the other piston B is at the end ofits up-stroke, the latter piston then striking the puppet valve H, so asto raise the same, whereby the steam from the right-hand side of theauxiliary piston G can pass through the port 3' to the valve seat I, andthrough the port is into the exhaust port f, so that the preponderanceof pressure is on the left hand side of the auxiliary piston G, and thelatter is forced to the right so that the slide valve F is moved in alike direction, and the ports 0 and f are disconnected, and the ports fand dare connected with each other, and at the same time, the part c isuncovered and opens to the steam chest E so that the motive agent canpass from the latter through the port 0 into the upper end of thecylinder A and through the port a into the lower end of the cylinder A.When the piston G travels to the right, then the portt' is opened oruncovered by the said piston and live steam can pass from the steamchest E, through the said port i into the upper end of the valve seat Ito force the puppet valve H therein downward into a lowermost position,so that the ports h and j are closed. Live steam is always admitted fromthe steam chest E to the'upper end of the valve seat I, so that thepuppet valve I-I therein is moved downward and seated as soon as thepiston B recedes. The exhaust of the cylinder A then takes place throughthe port d, slide valve F and exhaust port f, and the exhaust from thecylinder A takes place through the port I), the upper end of thecylinder A and ports (1 and f, by Way of slide valve F.

The above described operation is repeated,

it. being understood that the pistons always travel in oppositedirections, and alternately actuate their puppet valves H and H, tocause the piston G and valve F to shift, for open ing and closing theinlet and exhaust ports in the manner described.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent 1. An engine of the class described, comprisingtwo cylinders, each connected at one end with the opposite end of theother cylinder, pistons moving in opposite directions in the saidcylinders, a slide valve controlling the inlet and exhaust ports for thesaid cylinders, puppet valves actuated by-the said pistons, andauxiliary pistons carrying the said slide valve and controlled by thesaid puppet valve, substantially as shown and described.

2. An engine of the class described, comprising two cylinders,oppositely moving pistons therein, a steam chest, a slidevalvecontrolling the inlet and exhaust ports of the cylinders,ditferential auxiliary pistons on the stem of the slide valve, puppetvalves controlled by the main pistons, ports leading from opposite sidesof the larger auxiliary piston to the chamber of one of the puppetvalves at the seat of the latter, a port connecting the chamber of thesecond puppet valve at its seat with that of the first puppet valve andwith the back of the larger auxiliary piston, ports leading from thesteam chest to the tops of the puppet valves, and a port leading fromthe seat of the said second puppet valve to the main exhaust,substantially as described.

3. An engine of the class described, comprising two cylinders, eachconnected by a port at one end with the opposite end of the othercylinder, pistons moving in opposite directions in the said cylinder, aslide valve controlling the inlet and outlet ports for the saidcylinders, a steam chest containing the said slide valve and formed withan enlarged end, puppet valves actuated by the said pistons, andconnected by ports with the said steam chest and with the exhaust port,and an auxiliary piston carrying the said slide valve and controlledfrom the said puppet valves, substantially as shown and described.

4. In an engine, of the class described, the

combination with a slide valve controlling the inlet and outlet ports,of auxiliary pistons having different areas and carrying the said slidevalve, and independent puppet valves controlled by the cylinder pistons,and connected with the said steam chest and the exhaust port,substantially as shown and described.

HENRY BREITENSTEIN. \Vitnesses:

WILLIAM N. ROTH, HENRY J. OSBORNE.

